| article html file updated | 7 February 2020 23:48 CET | Update | https://www.mdpi.com/2227-7102/7/1/28 |
| article html file updated | 4 May 2019 10:27 CEST | Update | N/A |
| article html file updated | 27 October 2017 09:55 CEST | Update | N/A |
| article html file updated | 21 February 2017 12:57 CET | Original file | N/A |
| article xml uploaded. | 21 February 2017 12:55 CET | Update | https://www.mdpi.com/2227-7102/7/1/28/xml |
| article xml uploaded. | 21 February 2017 12:55 CET | Original file | N/A |
| article pdf uploaded. | 21 February 2017 12:55 CET | Updated version of record | https://www.mdpi.com/2227-7102/7/1/28/pdf |
| article pdf uploaded. | 20 February 2017 10:45 CET | Version of Record | https://www.mdpi.com/2227-7102/7/1/28/pdf-vor |
